PLATE V 



SPERM HEADS (RAM) : DRNA 



m^-w 



Guanine 0.9I 



Adenine |.|3 



Cytosjne 0.86 



^^f* 



Thymine t.lO 



PURINE AND PYRIMIDINE BASES IN SPERM DEOXYRIBONUCLEIC ACID 



Contact print, taken with ultraviolet light, of a paper chromatogram 

 from the acid hydrolysate of ram sperm-heads. The figures indicate 

 the molar ratios. 



